US4004644A - Roller cutter - Google Patents

Roller cutter Download PDF

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Publication number
US4004644A
US4004644A US05/652,864 US65286476A US4004644A US 4004644 A US4004644 A US 4004644A US 65286476 A US65286476 A US 65286476A US 4004644 A US4004644 A US 4004644A
Authority
US
United States
Prior art keywords
shaft
legs
bores
saddle
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/652,864
Other languages
English (en)
Inventor
Bernt Soren Liljekvist
Anders Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Santrade Ltd
Original Assignee
Sandvik AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik AB filed Critical Sandvik AB
Application granted granted Critical
Publication of US4004644A publication Critical patent/US4004644A/en
Assigned to SANTRADE LTD., A CORP. OF SWITZERLAND reassignment SANTRADE LTD., A CORP. OF SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SANDVIK AKTIEBOLAG, A CORP. OF SWEDEN
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/10—Roller bits with roller axle supported at both ends
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • This invention relates to the drilling art, and is concerned with improvements in roller cutters.
  • rollers and the bearing shafts on which they are rotatably mounted are subject to appreciable compressive stresses both axially and radially.
  • roller cutters used for tunneling and raise boring operations, due to the stationary mounting of the bearing shaft on which the roller is supported.
  • the bearing shaft is exposed to a very concentrated wear on a minor portion of the mantle surface of such bearing shaft.
  • both spaced-apart legs of a saddle structure of a drill bit cutter assembly are provided with bores each of which extends entirely through the legs to receive a clamping bolt, said bores extending in directions including therebetween an angle of 0°-90°, and the shaft-receiving recess between said legs being of a polygonal shape complemental to that of the end portion of said shaft such that said shaft is adjustable in two positions having its bolt-receiving transverse bore aligned with those of said legs in both said positions.
  • FIG. 1 shows a conventional bit cutter assembly for raise boring
  • FIG. 2 shows an end view of the bearing shaft received between spaced-apart legs of a saddle structure
  • FIG. 3 shows an end view of an alternative embodiment of the bearing shaft shown in FIG. 2.
  • a raise-boring equipment which comprises a central shaft 10 and cutters 11 arranged concentrically therearound to function as first and second cutting stages.
  • the cutters 11 are to be rotated by means of a system well known in the art.
  • Each cutter 11 comprises a conically shaped roller the mantle surface of which is equipped with cutting bits 12 of hard metal or other wear-resistant material.
  • Each said conical roller is rotatably mounted on a cylindrical bearing shaft 13 that is stationarily held in position by saddles 15. In FIG. 2 there is shown only one circular row of bits 12 on said conical mantle surface of the cutter 11.
  • the end portion 16 of shaft 13 has a regular polygonal shape; it is square-shaped.
  • the end portion 16 extends into a recess 19 between legs 17 and 18 of saddle 15, said recess 19 comprising flat surfaces complementary to those of said polygonal shaft end 16.
  • Shaft 13 has a transverse bore 21 for the reception of a bolt 20 that extends therethrough.
  • a corresponding bore 22 extends entirely through leg 18, located to the right in FIG. 2.
  • the two opposed flats of said shaft end 16 and said recess 19, through which said bores 21 and 22 extend coaxially, are perpendicular to the direction in which said bores extend.
  • Bolt 20 extends through bores 21 and 22, and has a threaded end with which a nut 23 is engaged to secure shaft 13 to leg 18. This is suitably effected by having nut 23, when in-screwed, engage with a recessed portion 24 of said leg 18.
  • bore 25 extending through leg 17 located to the left in FIG. 2.
  • bores 22 and 25 are located symmetrically in relation to the shaft-receiving recess 19 while including therebetween an angle of 90°.
  • shaft end 16 is provided with two coaxial counterbores 26 and 27 each of which is arranged to be coaxial with bores 22 and 25 of said legs respectively when securing the shaft to the saddle in each said alternative position.
  • the diameter of each said bore 26 and 27 is slightly larger than that of bolt-receiving bores 22 and 25.
  • a portion 28 of the length of each said bore 22 and 25 is correspondingly widened to permit a cylindrical locking pin 29 to be partly received in both said coaxial bores 27 and 25 respectively, thus safely securing said pin 29 axially.
  • This arrangement is formed to prevent the shaft from any rotational movement when the cutter being exerted to very large rotational forces.
  • the shaft end may have other suitable polygonal shape -- rectangular for instance -- provided there is provided means for adjustment of said shaft in two positions turning around an angle of 0°-90°.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
US05/652,864 1975-01-27 1976-01-27 Roller cutter Expired - Lifetime US4004644A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7500816A SE415994B (sv) 1975-01-27 1975-01-27 Anordning vid rullborrkronor
SW7500816 1975-01-27

Publications (1)

Publication Number Publication Date
US4004644A true US4004644A (en) 1977-01-25

Family

ID=20323494

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/652,864 Expired - Lifetime US4004644A (en) 1975-01-27 1976-01-27 Roller cutter

Country Status (13)

Country Link
US (1) US4004644A (fr)
JP (1) JPS5199602A (fr)
AU (1) AU500414B2 (fr)
CA (1) CA1036151A (fr)
DE (1) DE2602773C3 (fr)
FI (1) FI760182A (fr)
FR (1) FR2298679A1 (fr)
GB (1) GB1488231A (fr)
IT (1) IT1054471B (fr)
NO (1) NO760242L (fr)
SE (1) SE415994B (fr)
ZA (1) ZA76279B (fr)
ZM (1) ZM1176A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359114A (en) * 1980-12-10 1982-11-16 Robbins Machine, Inc. Raise drill bit inboard cutter assembly
US4448271A (en) * 1981-03-31 1984-05-15 Santrade Ltd. Earth boring device
US5328274A (en) * 1992-06-26 1994-07-12 Vooner Vacuum Pumps, Inc. Liquid ring vacuum pump-compressor with self aligning removable bearing bracket
US5423614A (en) * 1992-06-26 1995-06-13 Vooner Vacuum Pumps, Inc. Self aligning removable bearing carrier for a liquid ring vacuum pump
US5487435A (en) * 1994-07-07 1996-01-30 Baker Hughes Incorporated Mounting system for raise and shaft cutters
US6708786B2 (en) * 2001-05-08 2004-03-23 Smith International, Inc. Mounting attachment and bearing system for an industrial earth-boring cutter
WO2005014968A1 (fr) * 2003-08-11 2005-02-17 Murray & Roberts Ruc Limited Trepan a molettes
AU782643B2 (en) * 2001-05-08 2005-08-18 Sandvik Intellectual Property Ab Mounting attachment and bearing system for an industrial earth-boring cutter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5992542A (en) * 1996-03-01 1999-11-30 Rives; Allen Kent Cantilevered hole opener

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054466A (en) * 1959-09-21 1962-09-18 Drilprodco Inc Roller assemblies
US3612196A (en) * 1970-05-01 1971-10-12 Smith International Rock-boring cutter
US3747999A (en) * 1972-02-09 1973-07-24 Murphy Ind Inc G W Rotary cutter for earth boring bits
US3749188A (en) * 1971-08-20 1973-07-31 G W Murphy Indu Inc Drill bit
US3835944A (en) * 1973-06-12 1974-09-17 Hard Metals Ltd Cutting unit for use on rock boring machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054466A (en) * 1959-09-21 1962-09-18 Drilprodco Inc Roller assemblies
US3612196A (en) * 1970-05-01 1971-10-12 Smith International Rock-boring cutter
US3749188A (en) * 1971-08-20 1973-07-31 G W Murphy Indu Inc Drill bit
US3747999A (en) * 1972-02-09 1973-07-24 Murphy Ind Inc G W Rotary cutter for earth boring bits
US3835944A (en) * 1973-06-12 1974-09-17 Hard Metals Ltd Cutting unit for use on rock boring machines

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359114A (en) * 1980-12-10 1982-11-16 Robbins Machine, Inc. Raise drill bit inboard cutter assembly
US4448271A (en) * 1981-03-31 1984-05-15 Santrade Ltd. Earth boring device
US5328274A (en) * 1992-06-26 1994-07-12 Vooner Vacuum Pumps, Inc. Liquid ring vacuum pump-compressor with self aligning removable bearing bracket
US5423614A (en) * 1992-06-26 1995-06-13 Vooner Vacuum Pumps, Inc. Self aligning removable bearing carrier for a liquid ring vacuum pump
US5487435A (en) * 1994-07-07 1996-01-30 Baker Hughes Incorporated Mounting system for raise and shaft cutters
US6708786B2 (en) * 2001-05-08 2004-03-23 Smith International, Inc. Mounting attachment and bearing system for an industrial earth-boring cutter
AU782643B2 (en) * 2001-05-08 2005-08-18 Sandvik Intellectual Property Ab Mounting attachment and bearing system for an industrial earth-boring cutter
WO2005014968A1 (fr) * 2003-08-11 2005-02-17 Murray & Roberts Ruc Limited Trepan a molettes

Also Published As

Publication number Publication date
IT1054471B (it) 1981-11-10
JPS5199602A (fr) 1976-09-02
ZA76279B (en) 1977-01-26
AU1045776A (en) 1977-07-28
NO760242L (fr) 1976-07-28
AU500414B2 (en) 1979-05-24
CA1036151A (fr) 1978-08-08
ZM1176A1 (en) 1977-08-22
DE2602773B2 (de) 1977-12-01
GB1488231A (en) 1977-10-12
SE7500816L (sv) 1976-07-28
SE415994B (sv) 1980-11-17
FI760182A (fr) 1976-07-28
FR2298679A1 (fr) 1976-08-20
DE2602773A1 (de) 1976-07-29
DE2602773C3 (de) 1978-07-13

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SANTRADE LTD., ALPENQUAI 12, CH-6002, LUCERNE, SWI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SANDVIK AKTIEBOLAG, A CORP. OF SWEDEN;REEL/FRAME:004085/0132

Effective date: 19820908